Ministry of forestry organized the products quality inspection on log and sawn timber within the rang of state enterprises of nationwide forestry system.
Through the unified inspection on log and sawn timber of state enterprises in nine provinces, the results showed that the average percent of being qualified for dimension, grade and qualification batch of log and sawn timber were 94.13% and 87.62%, 98.78% and 98.55%, 88.50% and 92.8% respectively .
To meaure surface rough degree of saw timber sample, It affects the quality of processing tibmer surface when band saw cvtting velocity and processing velocity are diffeaent.
Therefore, it is very important to evaluate the vibration properties of the board in the round, especially for the sound radiation characteristic of radial sawn timber and its relationship to longitudinal sawn timber.
However, for the national and international experts, researches on radial sawn timber and its role and function in sound emission have not yet been developed.
A solar heated experimental drying kiln was installed in Madrid (INIA-Forest Industries Department) to study the efficiency of solar drying of sawn lumber in Spain, as compared with normal air drying.
A fair agreement was observed between the modulus of elasticity of saw logs (representing two common diameter classes/sawing patterns) and the structural grade of the sawn lumber (according to Anon (1995), Anon (2000)).
The effects of five major strikes in British Columbia sawmills in the period 1959 to 1974 on production, shipments and inventories of sawn lumber are analyzed using intervention analysis.